The massXpert software package is a mass spectrometry environment for linear (bio-)polymers. It inherits all the innovations of GNU polyxmass. It allows the detailed definition of new polymer chemistries in the XpertDef module. These chemistry definitions are then used in the desktop calculator-like mass calculator (XpertCalc) and in the sophisticated polymer sequence editor and (bio-)chemical/mass spectrometric simulations module (XpertEdit). Available simulations include polymer and monomer chemical modifications, polymer sequence cleavage, gas-phase fragmentation, m/z ratio calculations, and more. License: GNU General Public License (GPL) Changes: This release implemented a new fragmentation specification method for fragmentation patterns where the monomer undergoing fragmentation has its lateral chain decomposed. This is particularly useful in nucleic acids chemistry where the nucleic base might be eliminated at the monomer undergoing fragmentation according to the pattern 'a'. The French translation was updated. A memory leak and bugs were fixed. The user manual was updated.

	Read more at FreshMeat
	www.pheedo.com/click.phdo?i=3d0a3edab69eb7911f26385a28b764e9